The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 12, 2002
Filed:
Dec. 30, 1999
Applicant:
Inventors:
Assignee:
Noram Engineering & Constructors, Ltd., Vancouver, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 7/00 ; C01B 2/138 ; C01B 2/100 ;
U.S. Cl.
CPC ...
C01B 7/00 ; C01B 2/138 ; C01B 2/100 ;
Abstract
A method for oxidizing HCl to produce pure chlorine gas by reacting HCl with a mixture of sulfuric and nitric acids. Chlorine gas is evolved. Spent nitric and sulfuric acids are first regenerated by contact with air or oxygen. After regeneration, the entire stream of regenerated acid, or major portion thereof, is reconcentrated. The concentration of sulfuric acid occurs at lower strengths (60%-80%) and temperatures. The concentrated acid may be used to oxidize more HCl. Heat evolved by the regeneration of the spent acids is carried into the acid concentration stage.